After reviewing a patient's laboratory values, the nurse determines the patient is experiencing fluid volume deficit. Which laboratory value would the nurse cite as supporting this determination?
1. Serum sodium 140 mEq/L
2. Urine specific gravity of 1.003
3. Urine osmolality 330 mOsm/kg
4. Serum potassium 4.3 mEq/L
Answer: 3
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